sanpopo Black NFC Cards 30PCS 25mm (1 Inch) Coin NFC Card | NTAG215 Chip with 504 Bytes Memory

• About Product — 30 pieces black NFC coins tags, the round NFC cards is 25 mm in diameter. Small and portable to carry. The quantity is just the right amount for fun and needs; good choice as a small gift for your friend or family. Note: without self-adhesive glue; Not designed for use on metal surfaces
• About Chip — High quality NTAG215 Chip, with 504 bytes of available NDEF memory. Providing enough storage space, you can quickly write the information you want. It has a read-write lock function that makes the NFC cards can be edited repeatedly or read-only, cannot be edited or reset after set as read-only tag. The NFC blank tags can be read and written over 100,000 times, please note that it is not suitable for use in strong magnetic environment.
• About Material — Made of durable waterproof PVC material, the round PVC NFC cards can be placed outdoors or near water without the risk of losing functionality. No adhesive, not designed for use on metal surfaces; Designed to work with NFC devices or NFC compliant proximity coupling devices including other NFC-enabled phones and tablets. The surface is smooth, shiny and abrasion-resistant.
• About Application — Compatible with TagMo and most NFC-enabled Android phone & devices, you are able to write the NFC tag easily and make an tagmo for any weapon, pet, mount or fashion item you want. Quickly share your social messages, music, connect to WiFi,business card, URL, text, security, authentication purposes, ect. The NFC cards are rewritable, which means you can use them over and over again to store different data and information (for amiibos can only be edited once and cannot be reused)
• About Warranty — If, for any reason, you're not satisfied with the NFC stickers, we will issue you an exchange! Any questions, please do not hesitate to send the seller a message through Amazon and we will respond within 24 hours.

• On your Android phone or NFC-enabled device, go to settings and ensure NFC is turned on. For iPhones, check compatibility and ensure the NFC reader is active. — Ensure NFC is Enabled
• Use an NFC writing app like TagMo. Place the sanpopo NFC card near your device's NFC reader and follow the app's instructions to write your desired data (URL, text, Wi-Fi, Amiibo info). — Write Data to the Card
• Tap your device to the programmed card to verify it works as intended. If you want to make the data permanent, use the app's function to lock the NFC card, setting it to read-only. — Test and Lock (Optional)

Typical situations where sanpopo Black NFC Cards 30PCS 25mm (1 Inch) Coin NFC Card | NTAG215 Chip with 504 Bytes Memory helps — illustrative scenarios, not customer reviews.